If Code 26 is set with Code 32, diagnose Code 26 first and then clear codes and road test vehicle. If code reoccurs, use Code 32 chart to diagnose problem.

PCM verifies EGR function during a steady off-idle cruise (greater than 15 MPH) by grounding EGR drive circuit to energize solenoid and block off EGR vacuum source. This should result in a change in fuel control integrator. If a change is not seen by PCM, Code 32 is set.

NOTE: Test numbers refer to numbers on diagnostic chart.

With ignition off, EGR solenoid should be open. Vacuum should pass through EGR solenoid and open EGR valve.
With ignition on and ALDL test terminal "B" grounded, PCM will provide a ground for EGR solenoid. If power is present at solenoid, vacuum should now be blocked and EGR valve should not open.
With no power or ground supplied to EGR solenoid, vacuum should pass through solenoid. If vacuum does not pass through solenoid, vacuum hoses or EGR solenoid filter are plugged or EGR solenoid is faulty.

Fig 1: Code 32, Schematic, EGR System Error

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Code 32: EGR System Error

Use the Manual With the Right Hardware

When to See a Mechanic

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